/usr/lib/ghc-doc/hoogle/parsec.txt is in libghc-parsec3-doc 3.1.3-3.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-parsec3-doc/html/parsec.txt
/usr/lib/ghc-doc/hoogle/../../../share/doc/libghc-parsec3-doc/html/parsec.txt